I recommend that you get the Jeff Glover dvds. If you have the lockdown, I wouldn't necessarily CHOOSE to go to the deep half. I feel like the deep half is very good but there is nothing between it and mount. However, if you are already in the lockdown and they pass further to quarter guard, you can turn that into the deep half. So learn entries from being mounted, with someone on your back, getting passed... that kind of thing.